#include <stdio.h>
#include <string.h>

void printText(char*);
void printNumber(void(*)(char*));

int main() {
	printNumber(printText);
	return 0;
}

void printText(char* text) {
	printf(text);
	printf("\n");
}

void printNumber(void(*callback)(char*)) {
	char str[] = "hello world";

	printf("number: %d\n", 15);
	callback(str);
}